Toptoo Fungicide: The Dual-Action Disease Expert (Carbendazim + Mancozeb)
Master the art of crop protection with Nichino's Toptoo, a premium combination fungicide that cures infection from the inside and shields crops from the outside.
Toptoo is a superior "Saaf-segment" fungicide, formulated as a Wettable Powder (WP). It combines the systemic power of Carbendazim (12%) with the broad-spectrum contact protection of Mancozeb (63%). This synergy not only controls tough fungal diseases like Blast, Blight, and Rot but also nourishes your crop with essential Zinc and Manganese for lush green growth.
Best For: Paddy, Groundnut, Chilli, Tea, and Vegetable crops facing fungal stress.
Why Choose This Product? Key Benefits
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Double-Powered Action: Combines Systemic (curative) and Contact (protective) modes to kill fungus inside the plant and block new spores outside.
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Broad-Spectrum Control: Effectively manages a wide range of diseases including Blast, Leaf Spot, Rust, and Anthracnose in a single spray.
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Resistance Fighter: The multi-site action of Mancozeb protects the Carbendazim component, making it difficult for fungi to develop resistance.
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Rainfast Reliability: Adheres firmly to leaves and becomes rainfast within 4 to 6 hours, ensuring performance even in monsoon conditions.
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Phytotonic "Green" Effect: Supplies micronutrients Zinc ($Zn$) and Manganese ($Mn$) to the plant, boosting photosynthesis and resulting in visibly greener, healthier leaves.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Toptoo |
| Technical Name | Carbendazim 12% + Mancozeb 63% WP |
| IRAC MoA Code | 1 (Carbendazim) + M03 (Mancozeb) |
| Chemical Group | Benzimidazole + Dithiocarbamate |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Green Triangle (Slightly Toxic) |
How It Works: Mode of Action
Toptoo attacks fungal pathogens in two distinct ways, ensuring no escape for the disease.
- Systemic Cure (Carbendazim): Absorbed by roots and leaves, it moves upwards through the plant's vascular system. It stops fungal cell division (mitosis) by inhibiting $\beta$-tubulin, effectively curing infections that have already penetrated the plant.
- Contact Shield (Mancozeb): Forms a protective layer on the leaf surface. It disrupts fungal respiration and energy production, killing spores instantly upon contact and preventing new infections from taking hold.
- Synergistic Defense: The combination provides a "kick-back" curative effect while maintaining a durable shield, reducing the risk of resistance development compared to using single chemicals alone.
Note: Carbendazim targets the nucleus, while Mancozeb targets multiple metabolic sites.
Target Crops & Pests
[Image of Rice Blast disease symptoms]| Crop | Target Pest(s) |
|---|---|
| Paddy (Rice) | Rice Blast (Leaf, Neck, Node), Sheath Blight, Brown Spot |
| Groundnut | Tikka Disease (Leaf Spot), Collar Rot, Rust |
| Chilli & Vegetables | Anthracnose (Fruit Rot), Leaf Spot, Powdery Mildew |
| Potato | Early Blight, Late Blight, Black Scurf |
| Tea | Blister Blight, Grey Blight, Red Rust |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (g / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Paddy / Chilli | 300 g | 200 L | 1.5 g | 10-14 |
| Potato / Tea | 500 - 700 g | 200 - 300 L | 2.0 - 2.5 g | 7-14 |
| Groundnut / Maize | 200 - 400 g | 200 L | 1.0 - 2.0 g | 14 |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Seed Treatment: Use 2.5g per kg of seed for Groundnut/Potato.
How to Apply: Best Practices
- Timing: Apply preventively (before disease appears) or at the very first sign of leaf spots/lesions for best results. Repeat every 10–14 days if needed.
- Mixing: Toptoo is compatible with most insecticides. Do NOT mix with highly alkaline products like Bordeaux mixture or Lime Sulphur, as this degrades the Mancozeb.
- Coverage: Ensure thorough coverage of the foliage. For waxy leaves (like tea or groundnut), consider adding a sticker/spreader during monsoons.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid spraying near fish ponds.
Frequently Asked Questions
1. Is Toptoo safe for fish/aquaculture?
No. Toptoo is moderately toxic to fish. Do not use it near rivers, ponds, or pisciculture areas.
2. Why does my crop look greener after spraying Toptoo?
This is the "Phytotonic Effect." Toptoo supplies Zinc ($Zn$) and Manganese ($Mn$), which are essential for chlorophyll production, leading to greener leaves and better photosynthesis.
3. Can I use Toptoo on crops meant for export to the EU?
Caution is advised. While registered in India, Mancozeb and Carbendazim face strict restrictions in the EU. Always check the latest Maximum Residue Limits (MRLs) for your specific export destination before use.
4. What is the rainfastness of Toptoo?
Toptoo generally becomes rainfast within 4 to 6 hours after application. If it rains immediately after spraying, efficacy may be reduced.
5. Is Toptoo effective for seed treatment?
Yes. It is highly recommended for seed treatment (e.g., Groundnut, Potato) at 2.5g/kg seed to control soil-borne diseases like Collar Rot and Black Scurf.
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Use personal protective equipment (PPE) during application.
